Strange House (Japanese: ストレンジャーハウスStranger House) is a lone house at the base of Reversal Mountain.

The exterior of the Strange House

It is actively haunted by a ghost who appeared on the Marvelous Bridge in Pokémon Black and White. This ghost intentionally arranges furniture to force the player to enter various rooms. The player is able to leave the house at any time though. At the end, the player will receive the Lunar Wing.

Quotes

Top Left – "There is a Pokémon called Cresselia in the far Sinnoh region. Its wings shine like the crescent moon and keep nightmares away."

Bottom Left – "There are Pokémon called Hypno. Each one carries a pendulum that it can swing to make people drowsy. It has been said that a Hypno once hypnotized a child and took it away..."

Top Center – "There is a Pokémon called Darkrai in the far Sinnoh region. To protect itself, it drives people and Pokémon far away with terrible nightmares."

Bottom Center – "Some Pokémon know a move called Dream Eater. With this move, a Pokémon attacks while the target is asleep and eats its dream. It restores HP equal to half of the damage inflicted on the target."

Top Right – "There are Pokémon called Drowzee. They put others to sleep and eat their dreams. Eating nightmares can upset their stomachs."

Bottom Right – "Some Pokémon have the Forewarn Ability. A Pokémon with this Ability is alerted to one of the opposing Pokémon’s moves. High-power moves will be recognized first."